Keepers.. Feedback Pls

So I get to keep 5 players for next year and have 4 I'm pretty sure about but wanted opinions on the 5th.. Stasburg - Gio Gonzalez - Carlos Gonzalez - Ryan Zimmerman my keepers.. So who else should I keep.. Rizzo-Champman-Desmond-Carlos Santana-Matt Moore? Not sure where to go.. Thanks